The MDD version of the Power Mac G4 MDD is easily identifiable due to its Mirrored Drive Doors on the front of the computer.

The Power Mac G4 series of computers utilized a PowerPC G4 processor and was manufactured by Apple from 1999 to 2004.

The Power Mac G4 MDD (Mirrored Drive Doors) was the 3rd Major Revision of the Power Mac G4. It Included an 867MHz, 1GHz, or 1.25GHz PowerPC G4 CPU in single or dual configurations, and a Dual 1.42GHz PowerPC G4 CPU. This computer was the fastest, most powerful G4-Based Macintosh, before Mid-2004 when Apple introduced the Power Mac G5. It used an Xserve-Derived motherboard, supported up to 2GB of PC2700 333MHz DDR RAM, and had a 167MHz system bus on the mid range and high end models while the low end had a 133mhz system bus. It supported Airport or Airport Extreme (on the FW800 models) Wireless networking, and up to 4 Hard Drives, as well as up to 2 Optical Drives, the only Macintosh to do this except for the Mac Pro.